From owner-freebsd-hackers Mon Sep 23 11:01:11 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id LAA13684 for hackers-outgoing; Mon, 23 Sep 1996 11:01:11 -0700 (PDT) Received: from terra.Sarnoff.COM (terra.sarnoff.com [130.33.11.203]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id LAA13660 for ; Mon, 23 Sep 1996 11:01:08 -0700 (PDT) Received: (from rminnich@localhost) by terra.Sarnoff.COM (8.6.12/8.6.12) id NAA19247; Mon, 23 Sep 1996 13:59:45 -0400 Date: Mon, 23 Sep 1996 13:59:44 -0400 (EDT) From: "Ron G. Minnich" X-Sender: rminnich@terra To: Chuck Robey cc: freebsd-hackers@FreeBSD.org Subject: Re: user-level distributed shared memory available for freebsd In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk On Thu, 19 Sep 1996, Chuck Robey wrote: > On Mon, 16 Sep 1996, Ron G. Minnich wrote: > > > This system is called ZOUNDS. it's all user mode, no special sysadmin > > bugs to me, of course. > Ron, where is this? ftp://ftp.sarnoff.com/pub/mnfs/www/docs/cluster.html Look down the page, it's in the free software section (I hope). > I don't know if you have the time to pander to my curiosity on one point, > but I'm sure you know the anser to this (if you're not too busy). I know > unix in general has never had a really good file locking system. Why > doesn't someone write one just for FreeBSD? well, 1) I don't really do file locking, I use memory-variable locking, i.e. test-and-set stuff. That's in MNFS, the previous system, which I'm currently working to put into openbsd. 2) ZOUNDS is based on the one-writer model, as is the DEC memory-channel. The locking in ZOUNDS will not be based on the test-and-set model. I have not looked at FreeBSD locking, but I thought it worked ok on ufs? What's missing? NFS locking, now, that's another kettle of fish. ron